﻿using System;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Globalization;
using Windows.Graphics.Display;
using Windows.UI.ApplicationSettings;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkId=234227

namespace SensorsExample
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : Application
    {
        public SensorSettings SensorSettings { get; private set; }

        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App()
        {
            InitializeComponent();
            Suspending += OnSuspending;
        }

        protected override void OnWindowCreated(WindowCreatedEventArgs args)
        {
            base.OnWindowCreated(args);

            var displayInformation = DisplayInformation.GetForCurrentView();
            SensorSettings = new SensorSettings
            {
                DisplayOrientation = displayInformation.CurrentOrientation
            };
            displayInformation.OrientationChanged += (sender, o) =>
            {
                SensorSettings.DisplayOrientation = displayInformation.CurrentOrientation;
            };

            SettingsPane.GetForCurrentView().CommandsRequested
                += OnSettingsCommandsRequested;
        }

        private void OnSettingsCommandsRequested(SettingsPane sender, SettingsPaneCommandsRequestedEventArgs args)
        {
            var sensorSettingsCommand = new SettingsCommand("sensorSettings",
                "Sensor Settings", ShowSensorSettingsFlyoutHandler);
            args.Request.ApplicationCommands.Add(sensorSettingsCommand);
        }

        private void ShowSensorSettingsFlyoutHandler(IUICommand command)
        {
            var flyout = new SensorSettingsFlyout();
            flyout.Show();
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used such as when the application is launched to open a specific file.
        /// </summary>
        /// <param name="e">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs e)
        {

//#if DEBUG
//            if (System.Diagnostics.Debugger.IsAttached)
//            {
//                DebugSettings.EnableFrameRateCounter = true;
//            }
//#endif

            var rootFrame = Window.Current.Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active
            if (rootFrame == null)
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame {Language = ApplicationLanguages.Languages[0]};
                // Set the default language

                rootFrame.NavigationFailed += OnNavigationFailed;

                if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: Load state from previously suspended application
                }

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation
                // parameter
                rootFrame.Navigate(typeof(SensorsExamplePage), e.Arguments);
            }
            // Ensure the current window is active
            Window.Current.Activate();
        }

        /// <summary>
        /// Invoked when Navigation to a certain page fails
        /// </summary>
        /// <param name="sender">The Frame which failed navigation</param>
        /// <param name="e">Details about the navigation failure</param>
        void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            throw new Exception("Failed to load Page " + e.SourcePageType.FullName);
        }

        /// <summary>
        /// Invoked when application execution is being suspended.  Application state is saved
        /// without knowing whether the application will be terminated or resumed with the contents
        /// of memory still intact.
        /// </summary>
        /// <param name="sender">The source of the suspend request.</param>
        /// <param name="e">Details about the suspend request.</param>
        private void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
            //TODO: Save application state and stop any background activity
            deferral.Complete();
        }
    }
}
